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Re: RF Demo Kit Testing tutorial released
That tool looks like it would take all of 5 minutes to make. - Ed
By n5kzw · #9309 ·
Re: NanoVNA-Web-Client, problem with Chromebook
I have a relatively new ASUS Chromebook, with the latest Chrome version, and the experimental-web-platform-features enabled. The Web Client is working for me.
By KI7MWA · #9308 ·
Re: Si5351A Part Number #repair #internals
Hi, For clarification: An SI5351 outputs square-wave signals that contain only odd multiples of the fundamental frequency (3 * f, 5 * f, ...). To reach 1500 MHz, 7 * 214.285 MHz are therefore required
By Wolfgang Kiefer · #9307 ·
Re: Si5351A Part Number #repair #internals
Hi SiLabs datasheets are so and so when it comes to clarity. The current datasheet says that Si5351A can go up to 200 MHz. However, the max VCO frequency is 900 MHz, and with the then "forced" divider
By Bo, OZ2M · #9306 ·
Re: Possible Issue with ttrftech firmware (0.2.3-11) above 300 mhz
Forcing the SI5351 to above 1200MHZ VCO e.g. above 300MHz fundamental may overheat the SI5351 and permanently damage it. So you should be EXTREMELY careful when using a threshold command with values
By Erik Kaashoek · #9305 ·
Re: errors of "error" models
There is also a physical explanation why the imperfections of SOL standards are described (of parameterized) in a certain way. The connection from the VNA goes through the connector (which has a
By Erik Kaashoek · #9304 ·
Re: Si5351A Part Number #repair #internals
In addition to what Erik just said, if you ever perform a full clearconfig command via the console or install new firmware, you will need to reset the threshold level again.
By Larry Rothman · #9303 ·
Re: First PCB pictures of the V2
Hello, I'm new here on the list, been a nanovna user for a couple of months now, otherwise a long time VNA user, from HP8410 times onwards. Just to add my 1.9999 cents... I find nanoVNA really great.
By mcebokli@... · #9302 ·
Re: Nanovna Saver Q issue
It said my jpeg is processing but I am not sure it uploaded.
By vincent coppola <n1vc@...> · #9301 ·
Re: Si5351A Part Number #repair #internals
Officially the maximum output frequency of any SI5351 is 800MHz divided by 4 is 200MHz. Many will be able to produce 300MHz but the increase of the VCO of the internal PLL to 1200MHz implies the
By Erik Kaashoek · #9300 ·
Re: Si5351A Part Number #repair #internals
On Wed, Jan 8, 2020 at 04:54 AM, KE8CPD wrote: " Can anyone point to the correct chip? or any other tips to make my nanovna work about 300 mhz. "
By hwalker · #9299 ·
Re: errors of "error" models
Hi Gary, Regarding fringe capacitance, HP states that fringe capacitance can have an effect on measurement accuracy above about 300 MHz. This should explain ¡°why¡± knowing fringe capacitance is
By Jeff Anderson · #9298 ·
Re: RF Demo Kit Testing tutorial released
On Wed, Jan 8, 2020 at 01:09 PM, Dr. David Kirkby, Kirkby Microwave Ltd wrote: > Rudi, > The problem is the connector used on that is totally unsuitable. It is not > designed for repeated connections.
By Rudi · #9297 ·
Re: Cable phase stability tested
wrote: It's good to see some quantitative measurements made, but I believe the test procedure could be improved. Essentially it is irrelevant what the peak phase ch
By Dr. David Kirkby, Kirkby Microwave Ltd · #9296 ·
Si5351A Part Number #repair #internals
All, In a effort to repair my NanoVNA to work above 300 mhz, please see /g/nanovna-users/topic/34518859#4791. So i order a new si5351a chip, and replaced it last night. The new chip
By KE8CPD · #9295 ·
Re: RF Demo Kit Testing tutorial released
If you buy one and it fails, I would report via eBay as poor quality. You will soon get your money back. Dave
By Dr. David Kirkby, Kirkby Microwave Ltd · #9294 ·
Re: RF Demo Kit Testing tutorial released
Rudi, The problem is the connector used on that is totally unsuitable. It is not designed for repeated connections. Even the original manufacturer of the device, Hirosose, rate it at 20
By Dr. David Kirkby, Kirkby Microwave Ltd · #9293 ·
Re: First PCB pictures of the V2
Hey Gabriel and hey everyone, First: Thanks to all of you and of course Gabriel in particular for this really nice and worthwhile discussion! I hope that we can gather some more experiences and ideas.
By Mel · #9292 ·
Re: Nanovna Saver Q issue
On Wed, Jan 8, 2020 at 12:26 AM, vincent coppola wrote: " Here is a screen capture of my 40 m coaxial cable trap. ...' ==================================== Vince, Screen capture missing. - Herb
By hwalker · #9291 ·
Re: RF Demo Kit Testing tutorial released
Hello Klaus, Could you please tell more details: 1. which Test field do you mean? 2. Do you have a screen shot of a diagram? I have tested Testfield 1 Low Pass Filter 30 MHz, please see at:
By Rudi · #9290 ·